Entity formation records
Depending on entity type, prepare articles or certificates of formation/incorporation, partnership agreements, assumed-name/DBA records and any required operating agreement or bylaws.
Tax identification
Many businesses use an EIN. The IRS notes that many banks require an EIN to open a business bank account, although sole proprietors may encounter institution-specific rules.
Ownership and control information
For legal-entity customers, banks may request information about beneficial owners and a control person under customer due-diligence procedures. Requirements can vary by bank and customer risk.
Operational evidence
Banks may ask about expected activity, business address, industry, source of funds, payment volume or licenses. Higher-risk industries and treasury services can trigger additional review.
Primary sources and reference material
Prepare the legal and operating story before applying.
Good business banking decisions come from matching account structure, controls, insurance, service and payment workflows to how the company actually operates.